Home / 1,528.12-2,103.36-1,276.68

Finding the Fourth Proportional to 1,528.12, 2,103.36 and 1,276.68

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Solution

The fourth proportional to 1,528.12, 2,103.36 and 1,276.68 is: 1,757.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.12 : 2,103.36 = 1,276.68 : x
  2. Step 2: Convert to fraction form
    1,528.12/2,103.36 = 1,276.68/x
  3. Step 3: Cross multiply
    1,528.12x = 2,103.36 × 1,276.68
  4. Step 4: Simplify right side
    1,528.12x = 2,685,317.64
  5. Step 5: Solve for x
    x = 2,685,317.64/1,528.12
  6. Step 6: Final answer
    x = 1,757.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.